diff --git a/tests/data_normalizer/test_python.py b/tests/data_normalizer/test_python.py
new file mode 100644
index 000000000..c5cf8c3e9
--- /dev/null
+++ b/tests/data_normalizer/test_python.py
@@ -0,0 +1,48 @@
+"""Tests for Java data normalizers."""
+
+import pytest
+from f8a_worker.data_normalizer import PythonDataNormalizer
+
+
+@pytest.mark.parametrize('data,keymap,expected', [
+    # pick one key which IS there
+    ({'author': 'me', 'version': '0.1.2'}, (('author',),), {'author': 'me'}),
+    # pick one key which IS NOT there
+    ({'author-name': 'me', 'version': '0.1.2'}, (('author',),),
+     {'author': None}),
+    # pick & and rename one key which IS there
+    ({'author-name': 'me'}, (('author-name', 'author',),),
+     {'author': 'me'}),
+    # pick & and rename one key which IS NOT there
+    ({'authors': 'they'}, (('author-name', 'author',),),
+     {'author': None}),
+    # pick one of keys
+    ({'license': 'MIT'}, ((('license', 'licenses',), ),),
+     {'license': 'MIT'}),
+    # pick one of keys
+    ({'licenses': ['MIT', 'BSD']}, ((('license', 'licenses',),),),
+     {'licenses': ['MIT', 'BSD']}),
+    # pick one of keys and rename it
+    ({'license': 'MIT'}, ((('license', 'licenses',), 'declared_licenses'),),
+     {'declared_licenses': 'MIT'}),
+])
+def test_constructor(data, keymap, expected):
+    """Test AbstractDataNormalizer constructor."""
+    dn = PythonDataNormalizer(data)
+    assert dn is not None
+    assert keymap
+    assert expected
+
+
+def test_constructor_error_input():
+    """Test AbstractDataNormalizer constructor for error input."""
+    dn = PythonDataNormalizer("error")
+    assert dn is not None
+
+
+def test_normalize_error_input():
+    """Test AbstractDataNormalizer constructor for error input."""
+    dn = PythonDataNormalizer("error")
+    assert dn is not None
+    n = dn.normalize()
+    assert n == {}